Propeller.



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' No. 678,275. Patented luly 9, l90l.

W. B. PINKERTUN.

PROPELLER.

(Application med Dec. 31, 1900A (N'o llodgl 2 Sheets-Sheet 2.

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UNITED STATES PATENT OFFICE.

WILIAM BATES PINKERTON, OF OOTTONPLANT, ARKANSAS.

PROPE LLER.

$IEEGIFICATION forming part Of Letters Patent No. 678,275, dated July 9, 1901.

Application filed December 31, 1900. Serial No. 41,682. (No model.) i

To all whom, it may concern;

Be it known that I, WILIAM BATES PINK-v useful improvements involved in the construction of propellers; and my object is to, provide reliably efficient mechanism of the character specified which will enable great power to be applied to the propulsion of a vessel through the water, and while I shall confine my description in the following specification to a simple application of my invention to the stern of a vessel it will be understood that it may be variously applied to use.

In the accompanying drawings, Figure 1 is a side view of my invention complete, show-, ing the same as applied to use upon the stern of a vessel, while Fig. 2 is a rear elevation thereof, showing the propellers occupying various positions.

In order to conveniently designate the several features of my invention and their cooperating accessories, numerals will be employed, of which 1 indicates the stern of a vessel of the usual or any preferred construction, while 2 designates a suitable beam or portion of the framework, which preferably extends rearwardly sufliciently to form a bearing-seat for the driving-shaft 3.

It will be understood that the beams 2- are placed upon each side of the vessel and may be disposed at intervals between, if deemed desirable, the object being to provide a thoroughly reliable support for the crank-shaft 3, which is so shaped that preferably a plurality of orank=sections 4 will be provided.

In Fig. 2 I have illustrated the middle portion of the shaft as being further sustained and supported by across-beam 5, extending under the beams 2 and properly sustained in its operative position in any desired way.

Designed to cooperate with the plurality of crank-sections 4 are the propeller-arms 6,

which may be multiplied in number as deemed most desirable, it being understood that the *disposition of the several crank-sections 4 is such that the lower ends of the arms 6 will be alternately or successively disposed With-- Yin and drawn upward out of the Water, the

latter being designated by the numeral 7 in Fig. 1.

section 10, the object of'said rim being to enable the blade to engage the water and enable the arms to more efiiciently perform their office of propellingthe vessel or contributing to the propulsion thereof. The upper end of each of the arms'6 is held in its operative position by means of the lever-sections 11, said arm and lever being pivotally united, while the oppositeend of the lever-sections 11 are pivotally secured in place by a rod 12, which latter is secured in position upon the framework comprising the vertical section 13 and the brace-sections 14, as clearly shown in Fig. 1. The lower end of each of the arms 6 is disposed normally outward or rearward by means of the spring-section 15, which is properly secured in position, as by the bolts 16 and 17. In order to more securely hold the upright 13 in place, I provide the rod 18, thus constituting a secure piece of bridgework which will securely strengthen and sustain the several cooperating parts of my propel ment, and it therefore follows that while the 4 blade is passing through the water the force of the spring will be applied to the arm in such a way that said blade will be forced rearwardly. It is further obvious that when the blade has been raised out of the Water by the action of the crank-shaft to which the arm carrying the blade is secured, as the arm is drawn inward by the crank-shaft the spring will be again bent upon itself, so that when the blade again goes'downward into the water the force of the compressed spring will be utilized to again drive the blade rearwardly.

\Vhile I have described my improved propeller in cooperation with the auxiliary spring 15, I desire to use the propeller with or without said spring, as I may find most desirable in practice. By bolting the spring-sections in place they may be readily removed and renewed as desired. By pivotally connecting the upper ends of the arms 6 to the levers 11 by means of the bearing-plates 19, one of said plates being upon either side, a Very simple form of bearingis provided, inasmuch as a simple bolt may be passed through suitable apertures in the ends of the bearingplates and through the upper end of the arm 6, it being understood that sufficient play will be left between the bearing-plates to afford a perfect bearing-seat.

By multiplying the crank-sections 4 as desired upon the shaft 3 any preferred number of arms 6 may be mounted in position. It will be understood that the shaft 3 may be driven in any preferred way, as by a suitable piston 21, or said shaft may be operatively connected to the driving-power by other preferred means.

While I have described the preferred construction and combination of parts deemed necessary to materialize myinvention, it will be understood that I desire to comprehend all such substantial equivalents and substitutes as may fall fairly within the scope of my invention.

Having thus fully described my invention, What I claim as new, and desire to secure by Letters Patent, is-

The herein-described propeller comprising a driving-shaft having a plurality of cranksections; a plurality of arms cooperating with said crank-sections adapted to be operated by the rotation of said shaft; a series of levers pivotally connected to the upper ends of said arms, a cup-shaped blade attached to the opposite end of each of said arms, and a spring so mounted in position at the point of pivotal union of said lever and arm whereby the lower end of the arm will be normally eX- tended rearwardly; the spring being designed to facilitate the movement of the blade carried by the arm through the water, all combined substantially as specified and for the purpose set forth.

In testimony whereof I afiix my signature in presence of two witnesses.

WILIAM BATES PINKER'ION.

Witnesses:

A. C. CARTER, J. A. DIFFEY. 

